Abstract
We describe a novel stable piezoelectric nanopositioner which just use one piezoelectric stack and one simple driving signal, in which the central shaft is clamped by one BeCu spring and four SiN balls that bonded to the inner wall of the cylindrical tube. The cylindrical tube is fixed on the free end of the piezoelectric stack. Applying one increasing voltage signal on the piezoelectric stack, according to the principle of piezoelectricity, the piezoelectric stack will extend smoothly. When canceling this voltage signal suddenly, the piezoelectric will recover to its original length while the central shaft will keep stationary for its inertance. So, the central shaft will be sliding a small distance relative to the piezoelectric stack. Normally, the heavier of the central shaft, the better moving stability, resulting in a high output force of the nanopositioner. Because of the simple structure, simple working principle and good mechanical stability, our novel nanopositioner can be easily used in Scanning Probe Microscopy system and Active Optical mirror adjustment system in large scale astronomical telescope.
Highlights
Since the invention of nanopositioner which has nanometer positioning precision and centimeter adjusting range,[1] it has grown into a powerful tool with a large variety of applications, such as in Scanning Probe Microscopy (SPM),[2,3,4] Active Optics,[5,6,7] Biomedicine,[8] et al For example, in large scale astronomical telescope systems, active optical technology of splicing mirrors is mostly used, in which many small scale sub-mirrors spliced into large diameter mirrors.[9]
The piezoelectric nanopositioner is the right tool to be used in astronomical telescope systems which has nanometer accuracy and centimeter level adjustment range
Without complex structure and high voltage driving signals, we can position any small devices at nanometer accuracy and centimeter level adjustment range, which is urgently needed in SPM and active optics research fields
Summary
Since the invention of nanopositioner which has nanometer positioning precision and centimeter adjusting range,[1] it has grown into a powerful tool with a large variety of applications, such as in Scanning Probe Microscopy (SPM),[2,3,4] Active Optics,[5,6,7] Biomedicine,[8] et al For example, in large scale astronomical telescope systems, active optical technology of splicing mirrors is mostly used, in which many small scale sub-mirrors spliced into large diameter mirrors.[9]. The central shaft is hold by three special high precision springs in series which are hard to machine and adjust the friction force. The working performance is dependent on the friction force between the four edges of the tantalum shaft and the stainless steel guiding tube which cause it not easy to tune. (2) Large travel distance and high output force: Due to the working principle, the adjusting range of our nanopositioner can reach several centimeters. We present a novel stable inertial nanopositioner: PistolDrive, which just use one piezoelectric stack and one sawtooth driving signal. Without complex structure and high voltage driving signals, we can position any small devices at nanometer accuracy and centimeter level adjustment range, which is urgently needed in SPM and active optics research fields
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